Description: Official Protraction Diagrams (OPDs) are further subdivided into individual Outer Continental Shelf (OCS) blocks which are available as a separate layer. Some OCS blocks also contain other boundary information and are known as Supplemental Official Block Diagrams (SOBDs.) The OPDs and SOBDs serve as the legal definition for BOEM offshore boundary coordinates and area descriptions. The SOBD maps can be accessed by clicking on the link in the Supplemental Official Block Diagram field of the attribute table.
Copyright Text: Bureau of Ocean Energy Management (BOEM), Office of Strategic Resources, Geospatial Services Division